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Horay Solar Brand review

HS500TC-MHB-D

500 Wp TOPCon Bifacial 80%
ComparePV verdict

Strong in heat, heavy for its output

Rank 7,233 of 14,129
Compare panels Datasheet PDF
Power (Wp)
500
Weak · bottom 10%
Efficiency (%)
22.10
Weak · bottom 15%
Density (Wp/m²)
221.1
Weak · bottom 17%
Temp (%/°C)
-0.280
Strong · top 10%
Weight (kg)
28.0
Weak · 1.0 kg above median
Warranty (yrs)
30
Typical · median 30 yrs

The Horay Solar HS 191R-120 TC-D Basin series sets new standards in the high-efficiency module segment, focusing on advanced N-type TOPCon technology. Thanks to the use of rectangular R-type cells, these panels offer significantly higher energy density than traditional solutions, resulting in better utilization of the available roof or ground space. A key innovation is the bifacial double glass design, which allows for the generation of additional energy from both sides of the module, maximizing gains especially on bright surfaces. This solution effectively eliminates the problem of rapid light-induced degradation, guaranteeing stable operation for decades. Basin series panels are characterized by an excellent temperature coefficient, which makes them work efficiently even on hot days when standard cells lose power. This product is dedicated to investors seeking uncompromising durability and the highest yields per square meter of installation. A standout feature among the competition is the unique combination of aesthetics with increased mechanical resistance to extreme weather phenomena. By choosing this series, the user receives technology that realistically shortens the return on investment time thanks to higher efficiency in low-light conditions, such as dawn or dusk.

Ranking

435 panels in the segment TOPCon 500-550 W
Metric This panel Median Position in segment Overall rank
Module efficiency 22.10% 22.74% Weak · bottom 15% 6,076
Power density 221.1 227.4 Weak · bottom 17% 6,033
Temperature coefficient -0.280 -0.290 Strong · top 10% 1,347
Weight per kWp 56.0 52.4 Weak · bottom 8% 10,402
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

6 positive · 5 caution
Best for

Commercial and hot-climate.

Not ideal for

Weight-limited structures, tight roof space and roofs where every square metre has to count.

Strengths
-0.280 %/°C temperature coefficient

Top 10% of the TOPCon 500-550 W segment, against a median of -0.290. Ranked 1,347th in the whole database.

Watch-outs
56.0 kg per kWp

Bottom 8% of the TOPCon 500-550 W segment, against a median of 52.4. Ranked 10,402nd in the whole database.

22.10% module efficiency

Bottom 15% of the TOPCon 500-550 W segment, against a median of 22.74%.

221.1 watts per square metre

Bottom 17% of the TOPCon 500-550 W segment, against a median of 227.4.

What owners get
N-type TOPCon with R-cut 191mm cells

N-type TOPCon cells deliver an annual degradation rate of ~0.40% (vs. ~0.50% for PERC) and effectively eliminate LID. The rectangular R-format 191mm cell boosts energy density beyond standard 182mm configurations, enabling a 500-520 Wp power range across only 120 half-cut cells.

Bifacial double-glass construction

The glass-glass build with an 80-85% bifaciality factor contributes 5-30% additional energy yield from the rear side depending on ground albedo. Eliminating the UV-susceptible backsheet directly supports a 30-year design life and reduces the long-term LCOE of the installation.

30-year linear power warranty

The manufacturer commits to a maximum annual degradation of 0.40%, guaranteeing ≥87.4% of nominal power after 30 years of operation. This is one of the longest performance warranty standards available for double-glass modules, surpassing the 25-year norm offered by many competitors.

BNEF Tier-1 bankable status

Horay Solar has been listed on the BloombergNEF Tier-1 solar module manufacturers list since Q1 2025 and retained the status in Q1 2026. This facilitates project financing and insurance for C&I and utility-scale deployments where manufacturer bankability is a lender requirement.

22.1-23% efficiency in a compact layout

The 22.1-23% efficiency range positions the Basin series among premium 120-cell modules; peer DAH Solar DHN-60R20/DG reaches the same 23% ceiling, confirming technical competitiveness within this product class.

Trade-offs
Only 15-year product warranty

Horay Solar provides a 15-year product (materials and workmanship) warranty, whereas direct competitor HT-SAAE (HT54-18X(N) series) offers 25 years as standard. This gap is material for TCO calculations in industrial installations and externally financed projects, where lenders often require a minimum 20-year product warranty.

Efficiency below peer-group leaders

The maximum module efficiency of 23.0% is 0.8 pp below HT-SAAE HT54-18X(N) (23.8%) and 0.5 pp below TCL Zhonghuan HSM-BD60-LA (23.5%). On space-constrained rooftops of, say, 50 m², this translates to measurably lower energy yield per square meter compared with the best alternatives in the same price segment.

Notes from the database
  • At 22.1% efficiency, this panel is 0.6pp below the TOPCon 500-550W median of 22.7%
  • 221.1 W/m² power density is 6.3 W/m² below TOPCon 500-550W median (227.4 W/m²) - requires larger installation area
  • Temperature coefficient of -0.28%/°C matches the TOPCon 500-550W median
  • At 28.0 kg, weight matches the TOPCon 500-550W median
  • Bifacial design (80% factor) captures reflected light - adds 4-12% yield on ground-mount or white roof

Specifications

Open datasheet PDF
Nominal power (Pmax) 500 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 22.10 % Weak Segment median 22.74%
Vmpp · Impp 36.67 V · 13.64 A Operating point at max power
Voc · Isc 43.23 V · 14.52 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 1994×1134×30 mm · 2.26 m² of roof
Weight 28.0 kg Weak Weak · 1.0 kg above median
Cells 120 · TOPCon Monocrystalline
Bifaciality 80 % Rear output as a share of front
Coefficient Pmax -0.280 %/°C Strong top 10% of its segment
Coefficient Voc · Isc -0.230 · 0.040 %/°C
NOCT 45 °C At 800 W/m², 20 °C ambient
Product warranty 15 years Hardware defects only
Performance warranty 30 years Typical median 30 yrs · median 30 yrs
End-of-warranty output 87.4 % Equals 437 W guaranteed
Degradation 1.00 → 0.40 % First year, then annual

Datasheet charts

Open datasheet PDF

Measured curves published by Horay Solar in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 500 Wp appear here. The rest cover the whole series.

Linear Performance Warranty: N-type Solar Module vs Standard Module Linear Performance Warranty: N-type Solar Module vs Standard Module Whole series

Simulations

Live - change any input
Lifetime output & value
30 years at 1200 kWh/kWp/year and €0.50 per kWh
Power in year 30
-
Lifetime energy
-
Energy value
-
With bifacial gain
-

Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.

Heat losses
-0.280 %/°C against a segment median of -0.290
-
Bifacial gain
Rear gain over light concrete: -
-

Model: bifaciality × albedo × 0.6 view factor. A first-order estimate, not a yield simulation.

Alternatives

All Horay Solar panels
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Horay Solar HS500TC-MHB-D 500 W 22.10% -0.280 28.0 kg You are here
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg Cooler, lighter, +2.9 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg Cooler, lighter, +2.7 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg Cooler, lighter, +2.6 pp
WST-505BKX54-A2 505 W 24.70% -0.260 25.0 kg Cooler, lighter, +2.6 pp
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg Cooler, lighter, +2.4 pp
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg Cooler, lighter, +2.4 pp
CIPRO-TN9C54M-500W 500 W 24.50% -0.260 21.4 kg Cooler, lighter, +2.4 pp
HS505TC-MHB 505 W 22.30% -0.280 23.5 kg Lighter
HS510TC-MHB 510 W 22.60% -0.280 23.5 kg +10 W, lighter, +0.5 pp
HS515TC-MHB-D 515 W 22.80% -0.280 28.0 kg +15 W, +0.7 pp
HS520TC-MHB-D 520 W 23.00% -0.280 28.0 kg +20 W, +0.9 pp
LR7-60HVH-560M 560 W 24.80% -0.260 25.0 kg +60 W, lighter, +2.7 pp
LR7-60HVH-555M 555 W 24.60% -0.260 25.0 kg +55 W, lighter, +2.5 pp
LR7-60HVHL-550M 550 W 24.40% -0.260 16.3 kg +50 W, lighter, +2.3 pp
JAT60S40-540/LR 540 W 24.40% -0.260 23.5 kg +40 W, lighter, +2.3 pp
GK-5-60HG-540M 540 W 24.40% -0.260 23.3 kg +40 W, lighter, +2.3 pp

Found 81 panels of the same or similar size to this one, within ±10 mm. See them here Found 94 panels of the same or similar size to this one, within ±25 mm. See them here Found 588 panels of the same or similar size to this one, within ±50 mm. See them here Found 1913 panels of the same or similar size to this one, within ±100 mm. See them here

About the HS 191R-120 TC-D Basin series

6 answered

These answers cover the whole series. Where a figure differs, the specification above is this module's own.

What warranty does the Horay Solar HS 191R-120 TC-D Basin series come with?
The Basin series includes a 15-year product warranty covering material and workmanship defects, plus a 30-year linear power warranty. After 30 years, the module should retain at least 87.4% of its rated power output. This is among the most generous degradation schedules in its class and directly shortens the investment payback period. Horay Solar holds Tier 1 status on the BloombergNEF list, confirming the company's long-term bankability.
What is TOPCon technology and how does it differ from PERC in the Horay Solar HS 191R-120 TC-D Basin?
TOPCon (Tunnel Oxide Passivated Contact) is an N-type cell architecture that achieves higher efficiency than standard PERC thanks to tunnel oxide passivation layers. In practice this means greater energy yield per square meter of roof, better low-light performance at dawn, dusk, and under overcast skies, and significantly lower LID and LeTID degradation in the first years of operation. A 520 Wp Basin module built on TOPCon will realistically generate more kWh annually than an equivalent PERC panel.
Are the Horay Solar HS 191R-120 TC-D Basin panels bifacial, and does it matter on a typical rooftop?
Yes, the Basin series features a bifacial double glass construction, meaning the rear side is protected by tempered glass instead of a backsheet. On a pitched roof with a light-colored membrane or bright substrate, rear-side gain typically adds 5-15% additional energy. The effect is greatest on ground-mounted systems above white gravel or snow. The glass-glass structure also increases mechanical strength and eliminates PID degradation, supporting a service life well beyond 30 years.
What is the peak power of the Horay Solar HS 191R-120 TC-D Basin and how many panels are needed for a 10 kWp system?
The flagship variant of the Basin series is rated at 520 Wp under STC conditions. A 10 kWp system requires only 20 modules, reducing the number of mounting points and shortening installation time. The rectangular R-type cells enable denser cell packing on the module surface, delivering noticeably higher module efficiency compared to standard square-cell panels of the same wattage class.
Do the Horay Solar HS 191R-120 TC-D Basin panels perform well in summer when ambient temperatures exceed 40°C?
Yes. The Basin series benefits from an excellent power temperature coefficient (Pmax) typical of N-type TOPCon cells, around -0.30%/°C, compared to -0.35%/°C or worse for PERC modules. At a cell temperature of 75°C (a typical hot midday scenario), the Basin panel loses roughly 15% of rated power, versus 17-18% for a comparable PERC. Over a full year this difference translates into measurably higher annual energy yield, especially during peak summer months.
Is the Horay Solar HS 191R-120 TC-D Basin series still available for purchase?
Yes, the Basin series is an active, continuously manufactured product line from Horay Solar. The company appears on the BloombergNEF Tier 1 list for Q1 2025, confirming ongoing production and parts availability. Modules are available through authorized distributors. Before placing an order, it is advisable to confirm current stock of the specific wattage variant directly with your local importer.
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